Little Pimmit Run Community Meeting 10-4-2021
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Meeting Goals Vicinity Map Project Goals Existing Conditions Proposed Alignment Schedule Questions
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Little Pimmit Run Community Meeting 10-4-2021
- 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Little Pimmit Run Sanitary Sewer Realignment Project Community Meeting WW-000028-016 October 4, 2021
- 2. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Agenda 2 • Meeting Goals • Vicinity Map • Project Goals • Existing Conditions • Proposed Alignment • Schedule • Questions
- 3. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Meeting Goals 3 • Share information • Maintain open dialogue with the community • Build connections with local organizations such as homeowners associations
- 4. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Vicinity Map 4 • Kirby Road to the North • Franklin Park Road to the South • Bound by: – Briar Ridge Ct – Chesterbrook Vale Ct – Maddux Lane
- 5. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Project Goals 5 Improve and protect public infrastructure Assess sanitary sewer segments which cross Little Pimmit Run for relocation Prevent costly emergency repairs Reduce risks to public health and the environment
- 6. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Existing Conditions 6 Exposed and aerial sanitary sewers present risk to environmental and human health
- 7. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Existing Conditions 7 Sanitary Sewer Realignment Project will eliminate 5 exposed crossings
- 8. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Existing Conditions: Damaged Pipe 8 • Exposed pipes are at increased risk of damage • Realigning sanitary sewer will prevent recurrence of this issue • Pipe (X3) is stable, interim repair is ongoing
- 9. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Concurrent Stream Restoration Project 9 • Sanitary Sewer alignment designed in collaboration with Stream Restoration Project • For additional information and updates: https://www.fairfaxcounty.gov/publicworks/storm water/plans-projects/little-pimmit-run-tributary- chesterbrook-road-stream-restoration
- 10. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 10
- 11. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 11
- 12. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 12
- 13. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 13
- 14. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 14
- 15. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Proposed Design Alignment 15
- 16. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Schedule 16 Design/ Services Permitting Bid Phase Construction Phase Final Completion Nov. 2021 Nov. 2022 Jan. 2023 Feb. 2024 Project undergoes full engineering design by WDCD and consultant team Contractors bid to construct LPR sanitary sewer realignment project During this phase you may see or hear construction work in the project vicinity Construction is completed, improving sanitary sewer infrastructure and protecting environmental and human health
- 17. Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Stream Restoration Announcement 17 • October 11-22: Survey Crews in the field • Marking – Center line of the channel – Impacted trees
- 18. Additional Information For additional information, please contact www.fairfaxcounty.gov/publicworks Wastewater Design and Construction Division Little Pimmit Run Sanitary Sewer Realignment Project Suzy Harding 703-810-9727 Suzanne.Harding@FairfaxCounty.gov 18 https://www.fairfaxcounty.gov/publicworks/capital-projects/little-pimmit-run-sanitary-sewer-realignment-ww-000028-016
Editor's Notes
- Folks in attendance: Ben Wiles from Supervisor Foust’s Office Fred Wilkins from the Stormwater Planning Division (Fred is the Project Manager for the Stream Restoration Project) Will Schaffer & Mohammed Shammet from Kimley-Horn & Associates, which is the Engineering Firm designing the project.
- General project area is within the LPR stream corridor, bound by Kirby Road to the North and Franklin Park to the South, running parallel and bound by Briar Ridge Ct, Chesterbrook Vale Ct, and Maddux Lane
- Within the project area, there are 6 exposed stream crossings
- Realignment of the sanitary sewer will protect against future issues like this one. This crossing will be eliminated by the sanitary sewer realignment, but for now the pipe is stable and interim repairs are underway. The sanitary sewer realignment will provide long term protection of the infrastructure. This is an example of why the project is necessary and important.
- Design on the stream restoration project team has continued to advance, and multiple workshops have been held between the two project teams to ensure communication and collaboration.
- Proposed alignment, shown in green connects to existing MH 31-3-006, near Franklin Park Road. From the connection point, the proposed alignment runs north, on the west side of the stream. In collaboration with the Stream Restoration Project, the alignment is offset 10 ft from the bank of the proposed stream realignment. Every effort has been made to minimize property impacts while still achieving the project goal of protecting environmental and public health by ensuring the 10 ft buffer from the stream. In this section, two stream crossings are eliminated, X6 and X5. Proposed MH 1 will connect to the existing sanitary sewer between existing MH 31-3-007 and MH 31-3-003 to integrate the new system with the existing
- From proposed MH 2, the alignment continues north. The proposed alignment will cross the existing stream in this section; however, the realignment proposed by the Stream Restoration Project pushes the stream east and a minimum of 10 ft from the sanitary sewer. Design development at this location will be closely coordinated with the Stream Restoration Project team and adequate protection measures will be placed within the existing stream channel on an interim basis until the ultimate stream realignment is complete.
- In this section, the proposed alignment crosses Chesterbrook Road. An option to connect to existing MH 31-4-205 in Chesterbrook Road was explored, however, due to existing invert elevations, this connection could not be made without breaching the existing tributary south of Chesterbrook Road. Coordination is currently underway with the Stream Restoration Project team regarding the depth of the existing tributary and the viability of this option. One stream crossing, X4, is eliminated in this section.
- One stream crossing, X3, is eliminated in this section. It is worth noting that this is the crossing with recent tree damage discussed previously
- In this section, approximately 1,320 feet of existing sewer can be abandoned (shown with the red hatch), improving the overall efficiency of the network. Crossing X2 is eliminated in this section. Similar to the section at the south end of the project discussed previously, this section includes a segment of proposed sanitary sewer that crosses the existing stream. Once the stream realignment is completed, the 10 ft buffer will be established between the sewer and the stream. Design development at this location will be closely coordinated with the Stream Restoration Project team and adequate protection measures will be placed within the existing stream channel on an interim basis until the ultimate stream realignment is complete.
- This is the most downstream portion of the proposed alternative. The alignment terminates by connecting the existing MH 31-2-041, on Kirby Road. There is one remaining crossing at the north end of the project. This crossing will continue to be inspected regularly. If crossing starts to show deterioration signs, this crossing could be relined. Collaboration is underway with the stream restoration project to provide extra protection for this crossing by adding additional cover over the crossing.
- Summary bullets to provide general overview of what will be happening in each stage